CTRL+C does not store selected text in Copyq clipboard history

Bug description
-----------------------------------------
Copyq does not copy (read: store) anything selected from any application, incl gnome-terminal, when CTRL+C is applied nor does it store anything when a right-click menu 'Copy' has been applied in applications.

Copyq _**does**_ recognize the selected text and shows it in the Copyq titlebar, but CTRL+C does not store it to the clipboard history. Note that CTRL+C works system-wide on it's own. Just not recognized by Copyq as something to be stored.

The only way for me to copy anything is to enable the 'Store text selected using mouse' which is infuriating as it stores everything.

Expected behavior
-----------------------------------------
Invoking CTRL+C (or invoking a right-click menu 'Copy') should store selected text in Copyq history while the feature 'Store text selected using mouse' is disabled.

Additional information
-----------------------------------------
This has been tested with other version of Copyq and with fresh installs of Linux Mint (several different versions). CTRL+C has not been altered as global keyboard shortcut and like stated above, it works flawlessly.

Environment
-----------------------------------------
CopyQ Clipboard Manager v5.0.0~focal
Qt: 5.12.8
KNotifications: 5.68.0
Compiler: GCC
Arch: x86_64-little_endian-lp64
OS: Linux Mint 20.2